CN111023363B - Air conditioner and control method - Google Patents
Air conditioner and control method Download PDFInfo
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- CN111023363B CN111023363B CN201911300967.0A CN201911300967A CN111023363B CN 111023363 B CN111023363 B CN 111023363B CN 201911300967 A CN201911300967 A CN 201911300967A CN 111023363 B CN111023363 B CN 111023363B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the invention discloses an air conditioner and a control method, wherein the air conditioner comprises a jet throttling type system and a control unit, wherein the jet throttling type system comprises an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a first ejector, a four-way reversing valve, an electric control valve and a throttling component; an injection inlet of the first injector is connected with the outdoor heat exchanger and is also connected with one end of the throttling component, an injection port of the first injector is connected with a first end of the four-way reversing valve, and an outlet of the first injector is connected with a second end of the four-way reversing valve; the other end of the throttling component is connected with one end of a first indoor heat exchanger, the other end of the first indoor heat exchanger is connected with the third end of the four-way reversing valve and is also connected with one end of an electric control valve, and the other end of the electric control valve is connected with a gas-liquid separator; and the fourth end of the four-way reversing valve is connected with one end of the second indoor heat exchanger. The control unit is used for controlling the passage of the four-way reversing valve according to the current running mode and controlling the throttle component and the electric control valve to be opened and closed.
Description
Technical Field
The embodiment of the invention relates to the technical field of air conditioners, in particular to an air conditioner and a control method.
Background
Currently, a heat pump air conditioning cycle system includes four important components: compressor, condenser, throttling element and evaporimeter. The throttling component can convert a high-temperature and high-pressure liquid refrigerant into a low-temperature and low-pressure gas-liquid two-phase refrigerant, and the conversion process is an irreversible heat insulation throttling process and can cause irreversible pressure energy loss, so that the system performance is reduced.
In the prior art, an ejector can be used for replacing a throttling part to reduce the loss of unnecessary pressure energy, so that the energy efficiency of the heat pump air-conditioning circulating system is improved. However, when the ejector is used as the throttle member, simultaneous use in both the cooling and heating modes cannot be achieved.
In addition, the existing up-down air supply type heat pump air conditioner supplies air through waterfall type cold air at the upper air outlet during refrigeration and supplies air through floor heating type hot air at the lower air outlet during heating. This may limit the temperature range of the supply air.
Disclosure of Invention
The invention provides an air conditioner and a control method, which can reduce irreversible loss caused by a throttling component, simultaneously give consideration to a refrigeration mode and a heating mode, and can meet the air supply temperature requirements of different users.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides an air conditioner comprising: an injection-throttled system and a control unit. Wherein the injection-throttled system may comprise: the system comprises an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a first ejector, a four-way reversing valve, an electric control valve, a throttling component and a gas-liquid separator.
The injection inlet of the first injector is connected with the outdoor heat exchanger and is also connected with one end of the throttling component, the injection port of the first injector is connected with the first end of the four-way reversing valve, and the outlet of the first injector is connected with the second end of the four-way reversing valve;
the other end of the throttling component is connected with one end of a first indoor heat exchanger, the other end of the first indoor heat exchanger is connected with a third end of a four-way reversing valve and is also connected with one end of an electric control valve, and the other end of the electric control valve is connected with a first end of a gas-liquid separator;
the fourth end of the four-way reversing valve is connected with one end of the second indoor heat exchanger, and the other end of the second indoor heat exchanger is connected with the second end of the gas-liquid separator.
The control unit is used for controlling the passage of the four-way reversing valve according to the current running mode and controlling the throttle component and the electric control valve to be opened and closed so that the refrigerant flows to the first indoor heat exchanger and the second indoor heat exchanger; the current operation mode is a cooling mode or a heating mode.
With reference to the first aspect, in one possible implementation manner, the first end of the four-way reversing valve is an evaporation end, the second end of the four-way reversing valve is an exhaust end, the third end of the four-way reversing valve is a suction end, and the fourth end of the four-way reversing valve is a condensation end.
With reference to the first aspect and the possible implementations described above, in another possible implementation, the throttling component is any one of an electronic expansion valve, a capillary tube, and a second ejector.
With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the control unit is specifically configured to:
if the current operation mode is a refrigeration mode, controlling the first end and the third end of the four-way reversing valve to be communicated, controlling the second end and the fourth end of the four-way reversing valve to be communicated, controlling the throttling component to be opened, and closing the electric control valve;
and if the current running mode is the heating mode, controlling the first end and the fourth end of the four-way reversing valve to be connected, and controlling the throttling component and the electric control valve to be opened.
With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the control unit is further configured to:
and when the indoor temperature is detected to reach a preset temperature value or the night sleep mode is detected to enter, the throttle part and the electric control valve are controlled to be closed.
In a second aspect, a control method for an air conditioner is provided, where the method is applied to the air conditioner provided in the first aspect or a possible implementation manner of the first aspect, and the method may include:
controlling a passage of a four-way reversing valve according to the current operation mode, and controlling the throttle component and the electric control valve to be opened and closed so that the refrigerant flows to the first indoor heat exchanger and the second indoor heat exchanger; the current operation mode is a cooling mode or a heating mode.
With reference to the second aspect, in a possible implementation manner, according to a current operation mode, controlling a passage of the four-way selector valve, and controlling a throttle member and a switch of an electric control valve specifically includes:
if the current operation mode is a refrigeration mode, controlling the first end and the third end of the four-way reversing valve to be communicated, controlling the second end and the fourth end of the four-way reversing valve to be communicated, controlling the throttling component to be opened, and closing the electric control valve;
and if the current running mode is the heating mode, controlling the first end and the fourth end of the four-way reversing valve to be connected, and controlling the throttling component and the electric control valve to be opened.
With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the method may further include: and when the indoor temperature is detected to reach a preset temperature value or the night sleep mode is detected to enter, the throttle part and the electric control valve are controlled to be closed.
In a third aspect, an air conditioner is provided, including: a processor; when the air conditioner is operated, the processor executes the computer-executable instructions to cause the air conditioner to perform the control method of the air conditioner as in any one of the third aspect or possible implementation manners of the third aspect.
In a fourth aspect, there is provided a computer storage medium having stored thereon computer-executable instructions that, when executed on an air conditioner, cause the air conditioner to perform the method of controlling the air conditioner as in any one of the third aspect or possible implementations of the third aspect.
According to the control method of the air conditioner, the first ejector is adopted to replace a traditional throttling component, loss of irreversible pressure energy is reduced, the four-way reversing valve is arranged, the refrigeration cycle and the heating cycle are considered, and the energy efficiency of the air conditioner is improved. And through setting up two indoor heat exchangers, can realize dividing the regional branch temperature air supply, solve the limited problem of air supply temperature range of air supply formula air conditioner from top to bottom, satisfied different users' air supply temperature demand under the same space to user experience has been improved.
Drawings
FIG. 1 is a schematic diagram of a system with injection throttling according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating an air conditioner according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a refrigerant cycle for refrigeration according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a cycle of a refrigerant during heating according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to reduce irreversible loss caused by a throttling component, simultaneously consider a refrigeration mode and a heating mode and meet the air supply temperature requirements of different users, the embodiment of the invention provides a jet throttling type system. As shown in fig. 1, the injection throttling system may include: the system comprises an outdoor heat exchanger 11, a first indoor heat exchanger 12, a second indoor heat exchanger 13, a first ejector 14, a four-way reversing valve 15, an electric control valve 16, a throttling part 17 and a gas-liquid separator 18.
An injection inlet of the first injector 14 is connected with the outdoor heat exchanger 11 and is also connected with one end of the throttling component 17, an injection port of the first injector 14 is connected with a first end of the four-way reversing valve 15, and an outlet of the first injector 14 is connected with a second end of the four-way reversing valve 15;
the other end of the throttling component 17 is connected with one end of the first indoor heat exchanger 12, the other end of the first indoor heat exchanger 12 is connected with the third end of the four-way reversing valve 15 and is also connected with one end of an electric control valve 16, and the other end of the electric control valve 16 is connected with the first end of a gas-liquid separator 18;
the fourth end of the four-way reversing valve 15 is connected with one end of the second indoor heat exchanger 13, and the other end of the second indoor heat exchanger 13 is connected with the second end of the gas-liquid separator 18.
Further, with reference to fig. 1, the above-mentioned injection throttling system may further include: a compressor 19, and another four-way reversing valve.
The air outlet of the compressor 19 is connected with the exhaust end (end D) of another four-way reversing valve, the condensation end (end C) of the other four-way reversing valve is connected with the outdoor heat exchanger 11, the evaporation end (end E) of the other four-way reversing valve is connected with the third end of the gas-liquid separator 18, and the suction end (end S) of the other four-way reversing valve is connected with the air suction port of the compressor 19.
Further, the first end of the four-way selector valve 15 is an evaporation end (E-end), the second end of the four-way selector valve 15 is a discharge end (D-end), the third end of the four-way selector valve 15 is a suction end (S-end), and the fourth end of the four-way selector valve 15 is a condensation end (C-end).
Further, the throttle member 17 may be specifically any one of an electronic expansion valve, a capillary tube, and a second ejector. When the throttling member 17 is a second ejector, an injection inlet of the second ejector is one end of the throttling member 17, and an outlet of the second ejector is the other end of the throttling member 17.
Further, the electric control valve 16 may be specifically an electromagnetic valve or an electric valve.
An embodiment of the present invention further provides an air conditioner, as shown in fig. 2, the air conditioner may include: such as the injection throttle system 21 and the control unit 22 shown in fig. 1.
Wherein, the control unit 22 is used for controlling the passage of the four-way reversing valve 15 according to the current operation mode, and controlling the throttle part 17 and the switch of the electric control valve 16, so that the refrigerant flows to the first indoor heat exchanger 12 and the second indoor heat exchanger 13. The current operation mode may be a cooling mode or a heating mode.
Further, in a specific implementation, the control unit 22 is specifically configured to:
if the current operation mode is a refrigeration mode, controlling the first end and the third end of the four-way reversing valve 15 to be communicated, controlling the second end and the fourth end of the four-way reversing valve 15 to be communicated, controlling the throttling component 17 to be opened, and closing the electric control valve 16;
if the current operation mode is the heating mode, the first end and the fourth end of the four-way reversing valve 15 are controlled to be communicated, and the throttling component 17 and the electric control valve 16 are controlled to be opened.
Further, in the embodiment of the present invention, the control unit 22 may further be configured to:
and when the indoor temperature is detected to reach the preset temperature value or the night sleep mode is detected to enter, controlling the throttling component 17 and the electric control valve 16 to be closed.
Fig. 3 is a flowchart of a control method of an air conditioner for controlling the injection throttle type system shown in fig. 1 according to an embodiment of the present invention, and as shown in fig. 3, the method may include:
301. and according to the current operation mode, controlling the passage of the four-way reversing valve, and controlling the throttle component and the switch of the electric control valve to enable the refrigerant to flow to the first indoor heat exchanger and the second indoor heat exchanger.
The current operation mode may be a cooling mode or a heating mode. After the air conditioner is started, the control unit of the air conditioner can acquire a current operation mode according to the trigger instruction, and control the four-way reversing valve, the electric control valve and the throttling component according to the current control mode, so that the refrigerant flows to the first indoor heat exchanger and the second indoor heat exchanger, and the indoor temperature is adjusted. The trigger instruction may be an instruction generated when a user selects an operation mode through a remote controller or a line controller of the air conditioner, or an instruction received from a cloud terminal corresponding to the air conditioner. Specifically, the method comprises the following steps:
if the current operation mode is a refrigeration mode, the control unit controls the first end and the third end of the four-way reversing valve to be communicated, controls the second end and the fourth end of the four-way reversing valve to be communicated, and controls the throttle component to be opened and controls the valve relationship.
If the current operation mode is the heating mode, the control unit controls the first end and the fourth end of the four-way reversing valve to be connected and controls the throttling component and the electric control valve to be opened.
For example, based on fig. 1, assuming that the throttling component is an electronic expansion valve and the electronic control valve is an electronic valve, in conjunction with fig. 4, in the cooling mode, the cycle of injecting the refrigerant in the throttling system is as follows: the refrigerant is compressed by the compressor and then flows out of the high-temperature high-pressure gaseous refrigerant, and flows into the outdoor heat exchanger through the four-way reversing valve. The refrigerant and the outdoor air outside the pipe carry out convection heat exchange under the action of the enhanced convection of the outdoor fan, the high-temperature and high-pressure refrigerant continuously releases heat, and the supercooled liquid refrigerant flows out of the outdoor heat exchanger through the phase state change of the superheated steam section, the gas-liquid two-phase section and the supercooled liquid section. Part of the supercooled liquid refrigerant enters an electronic expansion valve, flows out of the low-temperature low-pressure refrigerant after throttling and pressure reduction, enters a first indoor heat exchanger in a gas-liquid two-phase mixed state, carries out convective heat exchange with indoor air on the outer side of a pipe under the action of enhanced convection of an indoor fan, continuously absorbs heat, provides air at a lower temperature for a room through phase change of a gas-liquid two-phase section and a superheated steam section, and flows out of the low-temperature low-pressure refrigerant from the first indoor heat exchanger. And the other part of the supercooled liquid refrigerant flowing out of the outdoor heat exchanger flows into an injection inlet of the first ejector as working fluid, enters a working nozzle, is subjected to accelerated expansion and pressure reduction to enable a receiving chamber of the first ejector to form a negative pressure region, so that the low-temperature and low-pressure refrigerant flowing out of the first indoor heat exchanger enters the receiving chamber of the first ejector as injection fluid, the two parts of the fluid enter a mixing chamber of the first ejector to be mixed, and finally, the speed reduction and the pressure expansion are completed in a pressure expansion chamber of the first ejector to be intermediate pressure. The medium-temperature and medium-pressure refrigerant flows out of an outlet of the first ejector, enters the second indoor heat exchanger to exchange heat with indoor air in a convection manner, continuously absorbs heat, and provides air with intermediate temperature for the indoor space through phase state changes of the gas-liquid two-phase section and the superheated steam section. The medium-temperature and medium-pressure refrigerant flowing out of the second indoor heat exchanger enters a gas-liquid separator, is subjected to gas-liquid separation and then enters a compressor, so that circulation is performed.
Therefore, in the refrigeration process, the electric valve is always kept closed, the flow of the refrigerant entering the first ejector and the first indoor heat exchanger is controlled by controlling the electronic expansion valve, the first indoor heat exchanger can provide lower temperature for the indoor space through the first ejector and the four-way reversing valve, the second indoor heat exchanger can provide middle temperature for the indoor space, the refrigerant with low temperature, low pressure and medium temperature and medium pressure is fully utilized, the air supply with different areas and different temperatures is realized, and the user experience is improved.
Referring to fig. 5, in the heating mode, the cycle of injecting the refrigerant in the throttling system is as follows: the refrigerant is compressed by the compressor, flows out of the high-temperature high-pressure gaseous refrigerant and enters the gas-liquid separator through the four-way reversing valve. The superheated gaseous refrigerant flows out of the gas-liquid separator, part of the superheated gaseous refrigerant enters the second indoor heat exchanger and carries out convection heat exchange with indoor air outside the pipe under the effect of the enhanced convection of the indoor fan, high-temperature hot air is provided for the indoor, and the high-temperature and high-pressure refrigerant continuously emits heat and changes phase states through the superheated steam section, the gas-liquid two-phase section and the supercooled liquid section. The subcooled liquid refrigerant flows out of the second indoor heat exchanger, enters the injection port of the first ejector through the four-way reversing valve, and enters the working nozzle of the receiving chamber of the first ejector to complete expansion, pressure reduction and conversion into the low-temperature and low-pressure refrigerant. The other part of the superheated gaseous refrigerant flowing out of the gas-liquid separator enters the first indoor heat exchanger through the electric valve, carries out convection heat exchange with indoor air outside the pipe under the effect of the enhanced convection of the indoor fan, provides hot air with intermediate temperature for the indoor, and the high-temperature and high-pressure refrigerant continuously releases heat and flows out of the supercooled liquid refrigerant from the first indoor heat exchanger through the phase change of the superheated steam section, the gas-liquid two-phase section and the supercooled liquid section. The supercooled liquid refrigerant is converted into a low-temperature and low-pressure refrigerant by an electronic expansion valve. The low-temperature low-pressure refrigerant and the low-temperature low-pressure refrigerant flowing out of the injection inlet of the first ejector are converged and then enter the outdoor heat exchanger in a gas-liquid two-phase mixed state, and carry out heat convection with outdoor air outside the tube under the action of the enhanced convection of the outdoor fan, and the low-temperature low-pressure refrigerant continuously absorbs heat and passes through phase state changes of a gas-liquid two-phase section and a superheated steam section. The gaseous refrigerant flowing out of the outdoor heat exchanger is circulated by entering the compressor through the four-way reversing valve.
Like this, in the heating process, come control to get into the refrigerant flow of first indoor heat exchanger and second indoor heat exchanger through control motorised valve, and make first indoor heat exchanger can be for indoor hot-air that provides the intermediate temperature through first sprayer and four-way reversing valve, and second indoor heat exchanger can be for indoor hot-air that provides the higher temperature, has realized the subregion and has divided the temperature air supply, has improved user experience.
Further, in the cooling mode or the heating mode, the control unit may control the electronic expansion valve and the electric valve to close when detecting that the indoor temperature reaches a preset temperature value or detecting that the indoor temperature enters the night sleep mode. In this way, the second indoor heat exchanger only performs cooling or heating, and the energy saving effect can be achieved.
According to the control method of the air conditioner, the first ejector is adopted to replace a traditional throttling component, loss of irreversible pressure energy is reduced, the four-way reversing valve is arranged, the refrigeration cycle and the heating cycle are considered, and the energy efficiency of the air conditioner is improved. And through setting up two indoor heat exchangers, can realize dividing the regional branch temperature air supply, solve the limited problem of air supply temperature range of air supply formula air conditioner from top to bottom, satisfied different users' air supply temperature demand under the same space to user experience has been improved.
Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical functional division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present invention may be essentially or partially contributed to by the prior art, or all or part of the technical solution may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions within the technical scope of the present invention are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (6)
1. An air conditioner, characterized in that the air conditioner comprises: an injection throttle system and a control unit; wherein the injection throttling system comprises: the system comprises an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a first ejector, a four-way reversing valve, an electric control valve, a throttling component and a gas-liquid separator;
the injection inlet of the first injector is connected with the outdoor heat exchanger and is also connected with one end of the throttling component, the injection port of the first injector is connected with the first end of the four-way reversing valve, and the outlet of the first injector is connected with the second end of the four-way reversing valve;
the other end of the throttling component is connected with one end of the first indoor heat exchanger, the other end of the first indoor heat exchanger is connected with the third end of the four-way reversing valve and is also connected with one end of the electric control valve, and the other end of the electric control valve is connected with the first end of the gas-liquid separator;
the fourth end of the four-way reversing valve is connected with one end of the second indoor heat exchanger, and the other end of the second indoor heat exchanger is connected with the second end of the gas-liquid separator;
the control unit is used for controlling the passage of the four-way reversing valve according to the current operation mode and controlling the throttle component and the switch of the electric control valve so as to enable the refrigerant to flow to the first indoor heat exchanger and the second indoor heat exchanger; the current operation mode is a refrigeration mode or a heating mode;
the control unit is specifically configured to: if the current operation mode is the refrigeration mode, controlling the first end and the third end of the four-way reversing valve to be connected, controlling the second end and the fourth end of the four-way reversing valve to be connected, controlling the throttling component to be opened, and closing the electric control valve; and if the current operation mode is the heating mode, controlling the first end and the fourth end of the four-way reversing valve to be connected, and controlling the throttling component and the electric control valve to be opened.
2. The air conditioner according to claim 1, wherein the first end of the four-way reversing valve is an evaporating end, the second end of the four-way reversing valve is a discharging end, the third end of the four-way reversing valve is a sucking end, and the fourth end of the four-way reversing valve is a condensing end.
3. The air conditioner according to claim 1 or 2, wherein the throttle member is any one of an electronic expansion valve, a capillary tube, and a second ejector.
4. The air conditioner of claim 1, wherein the control unit is further configured to:
and when detecting that the indoor temperature reaches a preset temperature value or detecting that the indoor temperature enters a night sleep mode, controlling the throttle part and the electric control valve to be closed.
5. A control method of an air conditioner applied to the air conditioner according to any one of claims 1 to 4, characterized by comprising:
controlling a passage of a four-way reversing valve according to the current operation mode, and controlling the throttle component and the electric control valve to be opened and closed so that the refrigerant flows to the first indoor heat exchanger and the second indoor heat exchanger; the current operation mode is a refrigeration mode or a heating mode;
if the current operation mode is the refrigeration mode, controlling the first end and the third end of the four-way reversing valve to be connected, controlling the second end and the fourth end of the four-way reversing valve to be connected, controlling the throttling component to be opened, and closing the electric control valve;
and if the current operation mode is the heating mode, controlling the first end and the fourth end of the four-way reversing valve to be connected, and controlling the throttling component and the electric control valve to be opened.
6. The control method of an air conditioner according to claim 5, further comprising:
and when detecting that the indoor temperature reaches a preset temperature value or detecting that the indoor temperature enters a night sleep mode, controlling the throttle part and the electric control valve to be closed.
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